Leptospirosis is caused by a bacterium called Leptospira interrogans. The organism is carried by many animals and lives in their kidneys. It ends up in soil and water through their urine.
If you’re around soil or water where an infected animal has peed, the germ can invade your body through breaks in your skin, like scratches, open wounds, or dry areas. It can also enter through your nose, mouth, or genitals. It’s hard to get it from another human, though it can be passed through sex or breastfeeding.
You’re at risk if you spend a lot of time around animals or in the outdoors. You’re more likely to be exposed to it if you have one of these jobs:
Farmer
Veterinarian
Underground worker (you work in a sewer or a mine)
Slaughterhouse worker
Military personnel
Also, if you raft, swim, or camp near affected lakes and rivers, you could get the disease.
Leptospirosis is more often found in warm climates. And although the bacteria lives all over the world, it’s especially common in Australia, Africa, Southeast Asia, Central and South America, and the Caribbean.